You can create your ssh key using ssh-keygen, it's a program that is part of the ssh installation. To do so just run it and follow the instructions on screen.
Here's an example:
$ ssh-keygen Generating public/private rsa key pair.
The default directory where you ssh key pair will be saved is inside the
.ssh folder in your home directory (you can change this by specifying a valid path) and the default name for the keypair is
id_rsa for the private key and
id_rsa.pub for the public key:
Enter file in which to save the key (/home/nasreddine/.ssh/id_rsa): /home/my_folder/my_ssh_key
You can protect your SSH key from unauthorized use by entering a password. This is optional but it's recommended that you use a passphrase. Note that, like with any other command program, when entering your passphrase it will not show anything on screen but it is being recorded:
Enter passphrase (empty for no passphrase): Enter same passphrase again:
Once you enter your passphrase ssh-keygen will generate a key and save it to the path you chose:
Your identification has been saved in /home/my_folder/my_ssh_key. Your public key has been saved in /home/my_folder/my_ssh_key.pub.
We're done. Now our ssh key is ready for use.